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Koi no Hiden -Spice Hen-
- Artist
- Kawai Sonoko
- Song
- Koi no Hiden -Spice Hen- (恋の秘伝-スパイス編-; Love's Secret -Spice Volume-)
- Lyrics
- Serizawa Rui
- Music
- Goto Tsugutoshi
- Other Information
- Arrangement: Goto Tsugutoshi
"Koi no Hiden -Spice Hen-" is a pop song recorded by Kawai Sonoko. The song is found on the album Siesta as track #2 and on the box set Kawai Sonoko Premium as track #2 on Disc 2.